How does parking sensors works, it is automatically activated when you change your gear on reverse. Sensors are fixed to the rear bumper of the vehicle and send, receive ultrasonic radio waves that bounce off obstacles or walls or other cars bumper and alert you to their presence.
There is an internal or external buzzer that gradually increases in frequency as you approach the object. A continuous tone denotes that you are approximately near on the obstacle.
Parking sensor contains, Central Control Processor, Sensors, Internal or external Buzzer, Digital Display with Speaker or Back Up Mirror Lens
Some models come with night vision cameras and L.C.D. monitors that plug into your head unit.
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